pinctrl/nomadik: adopt pinctrl sleep mode management

This fix makes pinctrl-nomadik able to handle
suspend/resume events and change hogged pins states
accordingly.

Signed-off-by: Julien Delacou <julien.delacou@stericsson.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-nomadik.c

@@ -34,6 +34,7 @@
 #include <asm/mach/irq.h>
 #include <mach/irqs.h>
 #include "pinctrl-nomadik.h"
+#include "core.h"
 
 /*
  * The GPIO module in the Nomadik family of Systems-on-Chip is an
@@ -1852,6 +1853,28 @@ static const struct of_device_id nmk_pinctrl_match[] = {
 	{},
 };
 
+static int nmk_pinctrl_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct nmk_pinctrl *npct;
+
+	npct = platform_get_drvdata(pdev);
+	if (!npct)
+		return -EINVAL;
+
+	return pinctrl_force_sleep(npct->pctl);
+}
+
+static int nmk_pinctrl_resume(struct platform_device *pdev)
+{
+	struct nmk_pinctrl *npct;
+
+	npct = platform_get_drvdata(pdev);
+	if (!npct)
+		return -EINVAL;
+
+	return pinctrl_force_default(npct->pctl);
+}
+
 static int nmk_pinctrl_probe(struct platform_device *pdev)
 {
 	const struct platform_device_id *platid = platform_get_device_id(pdev);
@@ -1963,6 +1986,10 @@ static struct platform_driver nmk_pinctrl_driver = {
 	},
 	.probe = nmk_pinctrl_probe,
 	.id_table = nmk_pinctrl_id,
+#ifdef CONFIG_PM
+	.suspend = nmk_pinctrl_suspend,
+	.resume = nmk_pinctrl_resume,
+#endif
 };
 
 static int __init nmk_gpio_init(void)